2. Draw a Lewis structure for each of the following molecules or ions. Give approximate values for the indicated bond angles. a) F-B-F angle in BF3 b) 0-S-O angle in SO2 CI. ci C-B-Cl angle = 120° O-S-o X= < 120° %3D d) H-C-H (angle 1) and C-C=N (angle 2) in acetonitrile, CH;CN. c) Cl-C-Cl angle in Cl2CO

Prof said R groups get closer together from sp2 to sp3.and large group=less favourable What is large group and small group?

Calculate the predicted magnetic moment for Er3+. a)  10.65 μB b)  9.58 μ c)  7.56 μB d) 0μB

9:27 PM Fri Oct 7 < 88 x Syllabus 1 bonding Po но Untitled (Draft) ✓ x syllabus 2 Isomeris... X orgo practice exam 1 NH₂ T X 3.5+ 3.6 Is This in Ras absolute configuration? NH₂ ☎75% Untitled (Draft)

1) Predict the wavelength (in nm) of the lowest-energy electronic transition in the following polymethine ion, (CH3)2N+=CH-CH=CH-CH=CH-N(CH3)2. Assume C-N and C-C conjugated bond lengths to be equal to1.4Å. Please explain how you determine electron count, length, and homo/lomo for n values

Absorbance at 453 nm 8393939 7 fl. oz./20 ml Beer-Lambert's Law (Spectrophotometry) #1 Fe (aq) + KSCN(s) FESCN "(aq) + K" (aq) 3+ To determine the moles of Fe (aq) in a 100. mL sample of an unknown solution, excess KSCN(s) is added to convert all the Fe (aq) into the dark red species FeSCN"(aq), as represented by the equation above. The absorbance of FESCN"(aq) at different concentrations is shown in the graph below. 2+ 0.50 目0.40 0.30 0.20 01 0. 0. 5 x 10-5 10 x 10-5 Concentration of FESCN2+ (M) If the absorbance of the mixture is 0.20 at 453 nm, haw many moles of Fe (aq) were present in the 100. mL sample? (Assume that any volume change due to adding the KSCN(s) Iis negligible.) 3+, 4x10-4 mol 3 x 104 mol (B) 4x 10-6 mol 3x 10-6 mol

Can you explain how to find the structure when it come to spin-spin splitting

Can IR spectroscopy be used for quantitative analysis? >No, because IR spectroscopy only records vibrational frequency of bonds. >No, because IR spectroscopy only identifies the types of covalent bonds. >Yes, because the transmittance of the analyte is proportional to concentration. >Yes, because the absorbance of the analyte is proportional to concentration.

Equation 5 is the second picture

determine the molecular structure based on the spectroscopic data in the picture explain for each picture